A Functional Journey Through Cryptography

Welcome! This interactive page explores the history of secret messages using JavaScript to perform real encryption and decryption for some classic ciphers.

Caesar Cipher

Text

Shift 3

Result

Frequency analysis

Monoalphabetic Substitution

Enter a 26-letter key (A→key[0], B→key[1], …). Example: QWERTYUIOPASDFGHJKLZXCVBNM

Plain / Cipher Text
Key

Result

Frequency analysis

Vigenère Cipher

Text

Keyword Autokey (demo)

Result

Frequency analysis

Frequency Analysis (any text)

Text

Modern Crypto Demo (AES-GCM) — Educational Only

Uses the browser’s SubtleCrypto. Do not use in production to protect real secrets here.

Plaintext
Password

Ciphertext (base64)
Decrypted

The Enigma Machine — Enhanced (3-rotor)

Educational simulator: 3 rotors, Reflector B/C, ring settings (Ringstellung), starting positions, plugboard, and correct double-stepping.

LeftA

MiddleA

RightA

Rotor Right Rotor Middle Rotor Left Reflector

Ring (R-M-L) Start (R-M-L) Plugboard

Typewriter Mode Strict Historical Mode (A–Z only)

Famous Crib Presets

Input Text

Output